Secure Socket Layer (Ssl) - D-Link xStack DES-3800 Series User Manual

The user may set the following parameters:
Parameter
Port
Forward Port
Clicking the Apply button will enter the combination of transmitting port and allowed receiving ports
into the Switch's Traffic Segmentation Table.

Secure Socket Layer (SSL)

Secure Sockets Layer or SSL is a security feature that will provide a secure communication path
between a host and client through the use of authentication, digital signatures and encryption. These
security functions are implemented through the use of a ciphersuite, which is a security string that
determines the exact cryptographic parameters, specific encryption algorithms and key sizes to be used
for an authentication session and consists of three levels:
Key Exchange: The first part of the cyphersuite string specifies the public key algorithm to be
1.
used. This switch utilizes the Rivest Shamir Adleman (RSA) public key algorithm and the
Digital Signature Algorithm (DSA), specified here as the DHE DSS Diffie-Hellman (DHE)
public key algorithm. This is the first authentication process between client and host as they
"exchange keys" in looking for a match and therefore authentication to be accepted to negotiate
encryptions on the following level.
Encryption: The second part of the ciphersuite that includes the encryption used for encrypting
2.
the messages sent between client and host. The Switch supports two types of cryptology
algorithms:
Stream Ciphers – There are two types of stream ciphers on the Switch, RC4 with 40-bit
•
keys and RC4 with 128-bit keys. These keys are used to encrypt messages and need to be
consistent between client and host for optimal use.
CBC Block Ciphers – CBC refers to Cipher Block Chaining, which means that a
•
portion of the previously encrypted block of encrypted text is used in the encryption of the
xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch
Figure 11- 32. Setup Forwarding Ports window
Description
Check the corresponding boxes for the port(s) you wish to transmit packets.
Check the boxes to select which of the ports on the Switch will be able to forward
packets. These ports will be allowed to receive packets from the port specified above.
226